Adjustable reamer.



* L H I ,No'. 783,904. PATENTE D FEB. 28. 1905.

W. J. SMITH.

ADJUSTABLE REAMER. ABPLIUATION FILED JUN: 3. 1904.

IQ mum 1 i WITNESSES INVENITOR A TORNEYS f UNITED STATES PatentedFebruary 28,1905.

PATENT OFF C I SMITH COMPANY, OF NEW HAVEN. (JONNE DELAWARE.

, ADJUSTABLE REAMEH.

gunman forming part r Letters Patent No. 783,904, dated February 28,1905.

i Application filed June 8,1904. Serial No. 211,036. V

To (l/M Lu/1.0m, it may concern:

Be it known. that I, WILLIAM J. Sm'ri-i. a citizen of the United Statesof America, and a resident of New Haven, in the county of New Haven,State of Connecticut, have invented an Improved Adjustable Reamer, ofwhich the following is a specification.

The object of my invention is to construct a simple and eflicientadjustable reamer which can be constructed and sold at a moderateexpense; and this object I attain in a manner 1 which I will nowdescribe.

In the accompanying drawings, Figure 1 is a longitudinal section of oneform of my improved reaming-tool. Fig. 2 is a view of the forward end ofthe tool, and Fig. 3 is a view of the rear end of the tool. Figs. 4 and5 are views illustrating two parts of the tool (leta-ched. Fig. 6 is alongitudinal section of a modified form of tool, and Fig. 7 is a view ofthe forward end of thesame. Referring to Figs. 1 to 5, inclusive, A isthe stockbored out to the form of a hollow tube, with a-centraldiaphragm or annular shoulder a; I cut through the body of the stockradial slots Bsix, in the present instance for thereception of thecutter-blades C. In tools of this character---that is, with radialcutters in slotsthe latter are cut in the outer end of the stock andclosed by a separate front plate held to the stock by' screws; but, aswill be seen most fully in Fig. 5, I cut the slots wholly within thebody of the st0ck,*so that the outer end a, which confines the cutterslongitudinally, is itself a partof the stock. Within the central chamberformed in the forward end of the stock I provide a rotarily-adjustablecam-piece D, which, as will be seen by reference to Figs. 2 and 4;,hasaround its circumferenee a series of cam-faces corresponding innumber with the number of the cutters. The inner edges of the cuttersU'are arranged to bear against these cam-faces, so that by turning thecam-piece (to the right in Fig. 2) the cutters can be adjusted or forcedoutwardly to ream out holes of increased diameter or to make up for thewear and grinding of the cutters. In conjunction with these expandingcams I provide means for tirmlv itself, midway ofits length, an annularunder- I I cut portion E with an inclined. face a, Fig. l, with whichcan engage the corresponding inclined face of a tongue 0,projecting-from the back edge of each cutter, Fig. 1.

In the modification shown in Fig. 6 I have shown the tongue withinclined face a formed by cutting a notch into the back of each cutter,and in that case the annular undercut portion with inclined face E hasto be formed of a diameter greater than the cammed portion of thecam-piece I).

In either construction it will require but slight longitudinal movementof the'eam-piece I) D to draw the cutters inwardly and clamp them firmlyto the cam-faces through the action of the inclines just described.Various devices may be employed for producing this longitudinalmovement. Thus in Figs. 1 to 5 l. have shown the campiece I) as providedat its inner end with a threaded bolt projecting through the centraldiaphragm or annular shoulder and l'laving threaded onto it a nut F,which bears against the rear side of that diaphragm or shoulder, so thatby turning this nut the cam-piece D may be drawn longitudinally inwardto cause the cutters to beclamped firmly to the eam-faces and also tolock the cam-piece in the position to which ithas been rotarilyadjusted.

In the modification illustrated in Figs. 6and 7 I. have shown thecam-piece l) as made tubular and having passing through it a headed boltF, the inner end of which is threaded into the diaphragm 117, so that byturning this bolt the cam-piece I) may be drawn longitudinally inwardinto the stock to clamp the cutters firmly onto their respectivecam-faces on the piece I) and the latter also locked in the position towhich it has already been adjusted rotarily.

The cam-piece D D in either construction may he provided on its outerend with suitable holes t, to which a key may be applied to turn thecam-piece rotarily, and the outer face of the cam-piece, together withthe adjacent Scrouter face of the stock, may, as shown inFigs. Q'and T,be provided with graduations to indicate the rotary adjustment.

Although I. have described my invention with particular reference toreamers which have cutters with plane c'uttingrfaces it will .be readilyunderstood that my invention may ing cam-faces againstwhich'the cuttersbear.

and means to clamp the cutters to the said cam-faces by alongitudinalmovement of the cam piece. j

'2. The herein-described cutting-tool, comprisingastock' havingradially-adjustable cutters, a central rotary cam-plece having -camfacesagamst which the cutters bear, and adapt- I ed to be adjustedlongitudinally within the stock, the cutters and cam piecej havinginclined engaging faces to clamp ,the;cutters to the cam-facesbylongitudinal adjustment of the cam p'ie'ce.

3. The herein-described cutting-tool, comprising a stock havingradially-adjustable: cutters, a rotary cam-piece having cam faces toadjust the cutters outwardly, inclined engaging faces on the cam-bieceand the cutters to clamp the cam-piece and cutters together by theendwise movement of the cam-piece. and means for drawing the cam-piecelongitudinally in the stock and locking it. y

In testimony whereof I have signed my name to this-specification in thepresence of two subscribing witnesses. r \VILLIAM J. SMITH.

\Vitnesses:

EDNA W. COLLINS, SARAH CARSON Coyxom 1

